JP3188788U - Bath lid - Google Patents

Abstract

[PROBLEMS] To provide a bath lid that is excellent in rigidity such as bending resistance with respect to a load while ensuring high heat insulation, and further reduced in weight.
In a bath lid that closes an opening of a bathtub with a plurality of substantially rectangular plate-like bodies, the substantially rectangular plate-like body has 30 weights of polypropylene resin or polypropylene resin component, respectively. % Of a foamed particle molded body having an apparent density of 20 to 60 kg / m ³ using a composite resin of polypropylene-based resin and polystyrene-based resin containing at least% as a base resin, and the other of the four sides of each plate-like body. A reinforcing material 2 made of synthetic resin is provided on the side that comes into contact with the plate-like body, and the side other than the side that comes into contact with the other plate-like body is supported by the edge of the bathtub opening. In this state, when the load of 30 kg / 100 mmφ is applied to the central portion of the plate-like body, the amount of sag of the plate-like body is within 20% of the longitudinal length of the plate-like body, and Wind whose total weight per sheet is 1000g or less It was a lid.
[Selection] Figure 4

Description

  The present invention relates to a flat-shaped bath lid that is placed on a bathtub for the purpose of keeping warm, and more particularly to a bath lid that places importance on lightness.

  Conventionally, as a flat-shaped bath lid, a sandwich-like structure in which a core material made of a synthetic resin foam or the like and front and back surface materials are bonded together, or a hard synthetic resin, in order to ensure heat retention and reduce weight A hollow molded product is used to form a plate-like lid body, and for the purpose of protecting the lid periphery and preventing danger, preventing slippage, preventing water from entering the interior, and improving the appearance, the peripheral edge of the lid body is made of rubber. And an edge material made of an elastic material such as synthetic resin are widely known (for example, Patent Documents 1 to 4).

  However, in the case of a sandwich-like structure, the flat-shaped bath lid used in the above-described conventional home tub has a thick plate as a whole in order to ensure predetermined rigidity and heat retention. When using a metal plate such as aluminum as the front and back face materials, or when making a hollow molded product, to increase the thickness of the hard synthetic resin layer that is the outer skin, the overall weight is inevitably heavy (even light ones, There was more than 2Kg per sheet.) There was a problem that it was difficult for children and elderly people to handle. Particularly in recent years, with the aging of the population structure, further weight reduction of the bath lid has been strongly desired from the viewpoint of risk prevention when dropped on a foot or the like.

  However, if it is not possible to construct a sufficiently rigid bath lid in pursuit of lightness only, for example, when the weight is applied from the upper surface side in the state of use placed on the bathtub, the lower side is greatly increased. There is a problem that the bath lid falls off due to bending deformation, or in some cases it is bent. In addition, if the core material made of a synthetic resin foam or the like is made thin with an emphasis on lightness, the heat insulating property is lowered, so there is a concern that the heat retaining property is lowered.

Japanese Utility Model Publication No. 51-14044 Japanese Utility Model Publication No. 52-77236 Japanese Patent Laid-Open No. 2004-33601 JP 2007-20640 A

  The present invention has been made in view of the above-described problems of the background art, and its purpose is to secure high heat insulation properties while being excellent in rigidity such as bending resistance to a load and to further reduce weight. To provide a bath lid.

In order to achieve the above object, the present invention provides a bath lid described in the following [1] to [6].
[1] In a bath lid that closes an opening of a bathtub with a plurality of substantially rectangular plate-like bodies, each of the substantially rectangular plate-like bodies contains 30% by weight or more of a polypropylene resin or a polypropylene resin component. It is composed of a foamed particle molded body having an apparent density of 20 to 60 kg / m ³ using a composite resin of polypropylene resin and polystyrene resin as a base resin, and the other plate-like body among the four sides of each plate-like body In a state where a reinforcing material made of synthetic resin is disposed on the side that comes into contact with, and the side other than the side that comes into contact with the other plate-like body of the plate-like body is supported by the edge of the opening of the bathtub, The amount of sagging of the plate-like body when a load of 30 kg / 100 mmφ is applied to the central portion of the plate-like body is within 20% of the longitudinal length of the plate-like body, and Total weight is 1000g or less The bath lid.
[2] The bath lid according to [1], wherein the reinforcing material made of the synthetic resin has a deflection load of 5 mm in a bending test of 3N or more.
[3] The bath lid according to [1] or [2], wherein the plate-like body formed of the foamed particle molded body has a thickness of 15 to 25 mm.
[4] The bath lid according to any one of [1] to [3], wherein the plate-like body formed of the foamed particle molded body has a molded skin layer on a surface thereof.
[5] The plate-like body composed of the foamed particle molded body is characterized in that the front and back plate surfaces are decorated with embossing, according to any one of the above [1] to [4] Bath lid.
[6] The bath lid according to any one of [1] to [5], wherein the plate-like body composed of the foamed particle molded body has films attached to the front and back plate surfaces. .

  According to the above-described bath lid according to the present invention, it is possible to provide a bath lid that is excellent in rigidity such as bending resistance with respect to a load while ensuring high heat insulating properties, and is reduced in weight.

It is the perspective view which showed the state which obstruct | occludes the opening part of a bathtub using one Embodiment of the bath lid concerning this invention. It is a top view of the bath lid which concerns on this invention, Comprising: (a) is a top view of the bath lid of embodiment shown in FIG. 1, (b) is a top view of the bath lid of other embodiment. It is sectional drawing of one Embodiment of the reinforcing material used in the bath lid which concerns on this invention. It is a principal part expanded sectional view which showed the state which has arrange | positioned the reinforcing material shown in FIG. 3 to the end surface of a plate-shaped object. It is the conceptual diagram which showed the deflection test method of the reinforcing material, Comprising: (a) is notional sectional drawing which showed the support stand of the reinforcing material, (b) is the conceptual side view which showed the deflection test method. It is the conceptual perspective view which showed the measuring method of the load bearing performance of a plate-shaped object.

  Hereinafter, embodiments of the bath lid according to the present invention will be described in detail with reference to the drawings.

  The bath lid according to the present invention includes a plurality of substantially rectangular plate-like bodies 1, and in the case shown in FIG. 1, two substantially rectangular plate-like bodies 1 </ b> A and 1 </ b> B provide an opening 11 of the bathtub 10. Is to block. It is good also as what closes the opening part of a bathtub with the plate body 1 of the substantially rectangular shape of 3 sheets or 4 sheets.

The substantially rectangular plate-like body 1 has an apparent density of 20 to 60 kg using a polypropylene resin or a composite resin of a polypropylene resin and a polystyrene resin each containing 30% by weight or more of a polypropylene resin component as a base resin. / M ³ expanded particle molded body.

  This is because the polypropylene resin is excellent in heat resistance, chemical resistance, toughness, strain recovery after compression, etc., and is suitable as a material for a bath lid, and contains 30% by weight or more of the polypropylene resin component. A composite resin of a polypropylene resin and a polystyrene resin is also more suitable as a bath lid material because it has excellent heat resistance, chemical resistance, etc., and can improve the rigidity by including a polystyrene resin. Can be used. The ratio of the polypropylene resin component in the composite resin is a value when the total of the polypropylene resin and polystyrene resin in the composite resin is 100% by weight, and the upper limit of the ratio of the polypropylene resin component is approximately About 95% by weight.

Also, to that the foamed bead molded article of the apparent density 20~60kg / m ^3, when the apparent density is of less than 20 kg / m ^3, it is difficult to achieve the required strength, conversely If it exceeds 60 kg / m ³ , it is not preferable because it is difficult to reduce the weight. From this point of view, the apparent density is more preferably from 25~50kg / m ^3, more preferably a 30~45kg / m ^3. The apparent density is a value obtained by dividing the weight of the foam by the volume, and the volume of the foam may be obtained by a submerging method or the like.

In the present invention, examples of the polypropylene resin include propylene homopolymers and copolymers of propylene and other olefins. Other olefins copolymerizable with propylene include ethylene, 1-butene, isobutene, 1-pentene, 4-methyl-1-pentene, 3-methyl-1-butene, 1-hexene, 3,4-dimethyl- 1-butene, 1-heptene, 1-methyl-1-hexene and the like can be mentioned. These propylene copolymers may be random copolymers or block copolymers, and may be not only binary systems but also ternary copolymers. The above polypropylene resins can be used alone or in admixture of two or more.
A composite resin of a polypropylene resin and a polystyrene resin can be obtained by impregnating a polypropylene resin particle with a styrene monomer. Here, the styrene monomer is a monomer mainly composed of styrene, and may contain a vinyl monomer copolymerizable with styrene. The weight ratio of the vinyl monomer is less than 50% by weight in the styrene monomer, preferably less than 20% by weight, more preferably 10% by weight or less. Therefore, in the present invention, the polystyrene resin means a polymer mainly composed of styrene, and not only a styrene homopolymer but also a copolymer of a vinyl monomer capable of copolymerizing with styrene and styrene. Are included in the range of polystyrene resins.

  The plate-like body 1 constituting the bath lid according to the present invention is a foamed particle molded body using the above base resin. This is a foamed particle molded body in which foamed particles are fused in a mold, and is excellent in uniformity of mechanical properties in the vertical, horizontal and thickness directions, and is a plate-like body balanced in strength. It is because it can form.

  If it is a foamed particle molded body, it is good also as the plate-shaped body 1 of the predetermined dimension which can be used as a bath lid by cut | disconnecting what was shape | molded in the block shape in the length, width, and thickness direction, but using a molding die Thus, it is preferably an in-mold expanded particle molded body that is formed into a plate-like body having a predetermined thickness without being cut at least in the plate thickness direction. This is because the in-mold expanded particle molded body using a molding die has a dense and smooth molded skin layer on the entire surface, so that there is little generation of debris due to rubbing and the like, and the strength can be improved and chipping or cracking can be achieved. Is preferable because In particular, when molding in the mold, the heating time is lengthened or post-heating is performed, so that only the surface in contact with the inner surface of the mold has a particularly dense molded skin layer, specifically, the apparent density of the molded skin layer. The apparent density of the part from the surface to a depth of 1 mm is 1.5 times or more, and further 3 times the internal apparent density (the apparent density measured by cutting away the 1 mm depth from the surface). The larger size is preferable because a high mechanical strength can be obtained and the generation of waste can be further prevented. In addition, when a long and wide plate-like body having a predetermined thickness is formed using a molding die, the plate-like body 1 having a predetermined vertical / horizontal dimension is obtained by secondary processing such as punching. That's fine.

Moreover, it is also preferable to form unevenness on the surface of the molding die and to decorate the front and back plate surfaces of the obtained plate-like body 1 with uneven texture. This not only changes the appearance of the bath lid made of the plate-like body 1 but also changes the touch comfort, and also has the effects of preventing slipping, making dirt (fingerprints) and scratches inconspicuous, It is preferable because it contributes to productivity, such as making the scratches and sink marks generated during the molding process inconspicuous and facilitating mold release (product removal from the mold).
Furthermore, it is good also as what stuck the film on the front and back board surface of the plate-shaped object comprised from the above-mentioned plate-shaped synthetic resin foamed particle molded object. The film is preferably a synthetic resin film having a base resin of 50 to 350 μm in thickness, such as polypropylene, polyester, polyethylene, polyvinyl chloride, polyamide, polycarbonate, etc., from the balance between lightness and rigidity, and the synthetic resin film is laminated. What stuck to the front and back board surface of a plate-shaped object by methods, such as a process and press work, is mentioned. In addition, when a synthetic resin expanded particle molded object and a film do not have thermal adhesiveness, you may stick through an adhesive agent or an adhesive.

  The vertical and horizontal dimensions per plate 1 are the size of the opening of the tub to be closed, closed with two plates, or with three or four plates. Of course, it depends on whether it is closed, but from the viewpoint of ease of handling, the vertical and horizontal dimensions of the plate-like body per sheet are preferably 30 cm or more and 150 cm or less, and 45 cm or more and 120 cm or less, respectively. It is more preferable that Moreover, the thickness dimension of the plate-like body 1 is preferably 15 to 25 mm, and more preferably 17 to 23 mm, from the viewpoints of heat insulation, strength, economy, and ease of handling.

  When the bath lid according to the present invention closes the opening of the bathtub in the substantially rectangular plate-like body 1 made of the above-mentioned foamed particle molded body, the bath lid is in contact with the other plate-like bodies of the four sides of each plate-like body. The reinforcing material 2 made of synthetic resin is disposed on the side in contact. That is, in the case where the opening 11 of the bathtub 10 is closed by the two substantially rectangular plate-like bodies 1A and 1B shown in FIG. 1, as shown in FIG. Reinforcing materials 2 are respectively disposed on the sides 1Aa and 1Ba on which the plate-like bodies 1A and 1B abut. In what closes the opening of a bathtub with three plate-shaped bodies, as shown in FIG. 2 (b), one side 1Aa, 1Ca of the plate-shaped bodies 1A, 1C and the plate-shaped body 1B Reinforcing material 2 is disposed on each of the two sides 1Ba and 1Bc.

  As the base resin of the reinforcing material 2 to be disposed on the plate-like body, from the viewpoint of excellent moldability, polyvinyl chloride, acrylonitrile / butadiene / styrene resin (ABS), polyethylene (PE), polypropylene (PP), It is preferably made of at least one synthetic resin selected from the group consisting of polyethylene terephthalate (PET) and unsaturated polyester resin. In particular, it is preferably a fiber reinforced plastic (FRP) whose strength is improved by mixing fibers such as glass fiber, carbon fiber, and Kepler into the base resin.

Further, the reinforcing material 2 is subjected to a bending test at a test speed of 5 mm / min in accordance with JIS K7171-1994, and the load when bent by 5 mm is preferably 3N or more, and is preferably 4N or more and 7N or less. Particularly preferred. This is a reinforcing material with a 5 mm deflection load of less than 3N, it is not possible to impart sufficient bending rigidity to the plate-like body even if it is added to the plate-like body made of a foamed particle molded body, It is not preferable because it is easily bent when a load is applied, and the lid made of a plate-like body may fall into the bathtub. From the viewpoint of such bending rigidity, weight reduction, and mounting properties to the end face of the plate-like body, the cross-sectional shape of the reinforcing member 2 is a T-shape having a high cross-section coefficient as shown in FIG. It is preferable to do. And as shown in FIG. 4, it is preferable to insert the T-shaped reinforcing member 2 into the end face of the plate-like body 1 in a state where the base portion 2a is buried, and fix it with an adhesive or the like. This is because the reinforcement 2 and the plate-like body 1 can be integrated by the presence of the base 2a of the reinforcement 2 inserted into the end face of the plate-like body 1, and the rigidity of the end of the plate-like body 1 is further improved. And by extension, it is preferable because the entire bending of the plate-like body 1 can be further suppressed.
Note that the deflection load when the reinforcing member 2 has a T-shaped cross section is supported by the support base A shown in FIG. 5 (a) at both ends of the reinforcing member 2 and compressed as shown in FIG. 5 (b). This is a deflection load when the child B is applied to the horizontally-mounted reinforcing material 2 (the reinforcing material in a state where the T-shaped base 2a is oriented in the horizontal direction) 2.

  In addition, the bath lid according to the present invention includes each side of the plate-like body 1, at least a side where the above-described reinforcing material 2 is not provided (1 Ab, 1 Ac, 1 Ad and 1 Bb, 1 Bc, 1 Bd in FIG. 2A). The edge members may be provided on the three sides, three sides 1Ab, 1Ac, 1Ad and 1Cb, 1Cc, 1Cd and two sides 1Bb, 1Bd in FIG. In particular, when a long and wide plate-like body having a predetermined thickness is formed and the plate-like body is formed into a plate-like body 1 having predetermined vertical and horizontal dimensions by secondary processing such as punching, Since there is no molded skin layer on each side of the plate-like body 1, there is an edge on each side that is the end face of the plate-like body 1 from the viewpoint of preventing the generation of debris due to rubbing, preventing dirt, and improving the strength. It is preferable to provide a member.

  Examples of the material of the edge member include a hard synthetic resin such as polyethylene, polypropylene, polyvinyl chloride, and polycarbonate, or a lightweight metal such as an aluminum alloy and a magnesium alloy, and a molding material having a U-shaped cross section formed of the material. be able to.

The bath lid according to the present invention is composed of a plurality of substantially rectangular plate-like bodies 1 having the above-described configuration, and the load resistance performance of each of the plurality of substantially rectangular plate-like bodies 1 is shown in FIG. As shown, in the side other than the side that abuts the other plate-like body 1 (for example, in the case of the 1A plate-like body shown in FIG. 2A, 1Ab, 1Ac, 1Ad 3B, in the case of the 1B plate shown in FIG. 2B, the two sides 1Bb and 1Bd) are supported by the edge of the opening 11 of the bathtub 10, and the plate 1 The amount of sag of the plate-like body 1 when a load W of 30 kg / 100 mmφ is applied to the center (between the height position of the opening of the bathtub and the height position of the back plate surface of the most sagged part of the plate-like body Is within 20% of the longitudinal length of the plate-like body (the length on the long side of the substantially rectangular plate-like body), preferably within 10%, more preferably Properly are those of less than 7%. If this is not a plate-like body with such load-bearing performance, when a load is applied to the lid by a person placing a hand on the lid, the lid made of the plate-like body is placed in the bathtub. This is because there is a risk of falling off. In addition, the direction along the side in contact with the other plate-like body is usually the longitudinal direction of the plate-like body.
Further, the total weight of one plate 1 is 1000 g or less, preferably 700 g or less, and particularly preferably 500 g or less. This is because if it is a plate-like body exceeding 1000 g, it may be difficult for an elderly person or a child to handle, and there is a concern that it may be damaged when dropped on a foot or the like. .

  The bath lid according to the present invention is a bath lid that secures high heat insulation and is excellent in rigidity such as bending resistance to load, and is light in weight, and can be handled safely even by elderly people or children. It can be suitably used as a bath lid for a domestic bathtub or the like.

1 plate-like body 1A, 1B, 1C plate-like body 1Aa, 1Ab, 1Ac, 1Ad plate-like body side 1Ba, 1Bb, 1Bc, 1Bd plate-like body side 1Ca, 1Cb, 1Cc, 1Cd plate-like body side 2 reinforcement Material 10 Bath 11 Opening A Support Base B Compressor W Load

Claims (6)

In the bath lid that closes the opening of the bathtub with a plurality of substantially rectangular plate-like bodies,
Each of the substantially rectangular plate-like bodies has an apparent density of 20 to 60 kg / polypropylene resin or a composite resin of a polypropylene resin and a polystyrene resin each containing 30% by weight or more of a polypropylene resin component as a base resin. m ³ foamed particle molded body,
Of the four sides of each plate-like body, the side that contacts the other plate-like body is provided with a reinforcing material made of synthetic resin,
A plate when a load of 30 kg / 100 mmφ is applied to the central portion of the plate-like body in a state where the sides other than the side in contact with the other plate-like body are supported by the edge of the opening of the bathtub The amount of sagging of the rod-shaped body is within 20% of the longitudinal length of the plate-shaped body,
The total weight per sheet of the plate-like body is 1000 g or less,
A bath lid characterized by that.   The bath lid according to claim 1, wherein the reinforcing material made of the synthetic resin has a bending load of 5 mm in a bending test of 3 N or more.   3. The bath lid according to claim 1, wherein the plate-like body formed of the foamed particle molded body has a thickness of 15 to 25 mm.   4. A bath lid according to any one of claims 1 to 3, wherein the plate-like body composed of the foamed particle molded body has a molded skin layer on the surface thereof.   The bath lid according to any one of claims 1 to 4, wherein the plate-like body composed of the foamed particle molded body is decorated with embossing on the front and back plate surfaces.   The bath lid according to any one of claims 1 to 5, wherein the plate-like body composed of the foamed particle molded body has a film attached to the front and back plate surfaces.

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